Exception dialog box is not poping up for exceptions in Applet Life cycle in Firefly PR3 using NS6

Platform : Solaris 8 /Win NT/ Red hat Linux 6.2 / IA Solaris 8
Browser : Netscape 6

Steps to run the NS6 Browser and plugin

  1) rlogin to target Solaris or Linux system
  2) set the DISPLAY variable back to your system. Example...
  
       setenv DISPLAY oxe.east:0.0 (Solaris using cshell)
       
                    or
                    
       export DISPLAY=oxe.east:0.0 (Linux)
       
     Substitute your system name for 'oxe' above.
     
  3) cd /net/sqesvr.eng/deployment3/mozilla/pr3
  4) ./run_mozilla
  5.) Enable the exception bialog box in the Java Control Panel
  6.) go to the below link and execute the testcases
      http://sqesvr.eng.sun.com/deployment2/sridhare/ws/doc/proc/JPI_AUE.html

Result : Exception Dialog box is not popping up while exceptions thrown are being shown in the Java Console

Note : When I executed the same test on NS 4.75 browser the exception dialog box was shown